WQ0001492_Final Permit_20021230

OF MATE- Michael F. Easley, Governor
0t� QG William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
r
={ Alan W. Klimek, P.E., Director
O Division of Water Quality
December 30, 2002
MR. FRANK R. BARONE, SITE MANAGER
OCCIDENTAL CHEMICAL CORPORATION
POST OFFicE Box 368
CASTLE HAYNE, NORTH CAROLINA 28429
Subject: Permit No. WQ0001492
Occidental Chemical Corporation
Castle Hayne, NC Manufacturing Facility (SDU)
Surface Disposal of Residual Solids (503 Exempt)
New Hanover County
Dear Mr. Barone:
In accordance with your renewal application received on December 31, 2001, we are forwarding
herewith Permit No. WQ0001492, dated December 30, 2002, to Occidental Chemical Corporation for the
continued operation of residuals stabilization/conveyance facilities and a surface disposal unit at its Castle
Hayne, NC Manufacturing Facility.
This permit shall be effective from the date of issuance until November 30, 2007; shall void
Permit No. WQ0001492, issued on March 26, 1999; and shall be subject to the conditions and limitations
as specified therein.
This permit approves the continued operation of the subject wastewater residuals surface disposal
unit for another five-year cycle. However, please take the time to review this permit thoroughly as
some of the conditions contained therein may have been added, changed, or deleted since this permit
was last issued. Of special interest are the following conditions (i.e., non -inclusive list):
♦ The Division of Water Quality (Division) implemented the use of a new database system in
May 2001. Condition I. 1. requests that certain information required for entry into this
database be submitted to the Division within a 90-calendar day time period.
♦ Because it is the Division's understanding that Occidental Chemical Corporation sold certain
assets at the Castle Hayne, NC Manufacturing Facility to Elementis Chromium, L.P. on
December 6, 2002, Condition I. 2. delineates very specific requirements for the preparation
and submission of a permit application package to request that certain minor modifications be
made to this permit that reflect the nature of the asset purchase by Eiementis Chromium, L.P.
♦ Condition 1. 10. requires that level gauges to monitor freeboard levels in both sections of the
surface disposal unit be installed within 90 calendar days if they are not already existing.
♦ Condition IV. 1. states that results from sampling events conducted at groundwater
monitoring wells associated with monitoring the progress of a corrective action plan (CAP)
that was approved by the Division in 1999 are no longer required to be submitted for the
purpose of permit compliance. Please note that the groundwater monitoring program
approved under the CAP should proceed as stipulated under the Division's approval.
AnE N—A
Non -Discharge Permitting Unit Internet httpJ/h2o.enr.state_nc.us/ndpu
1617 Mail Service Center, Raleigh, NC 27699-1617 Telephone [phone] Fax [phone]
DENR Customer Service Center Telephone [phone]
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Pay particular attention to the monitoring requirements in this permit. Failure to establish an
adequate system for collecting and maintaining the required operational information will result in future
compliance problems. PIease also make note of this permit's expiration date and the fact that a permit
renewal is due to the Division no later than six months prior to that date, as the Division does not send
reminders to apply for permit renewal.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the
right to request an adjudicatory hearing upon written request within 30 days following receipt of this
permit. This request must be in the form of a written petition, conforming to Chapter 150B of North
Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service
Center, Raleigh, NC 27699-6714. Unless such demands are made, this permit shall be final and binding.
If you need any additional information concerning this matter, please contact Ms. Shannon Mohr
Thornburg by telephone at [phone], extension 353, or via a -mail at
[e-mail].
Sincere ,
for Alan W. Klimek, P.E.
CC' Mr. Gene F. Renzaglia, Elementis Chromium, L.P.
New Hanover County Health Department
Mr. Tracy E. Davis, P.E., NCDENR-DLR (Land Quality Section/Mining Program)
Ms. Natalie Sierra, Central Office-NPDES Unit
Central Office -Groundwater Section
Wilmington Regional Office -Water Quality Section
Wilmington Regional Office -Groundwater Section
Technical Assistance and Certification Unit
Water Quality Central Files
NDPiYF-ilgs � .
NDPU Residuals Program Coordinator
2

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
SURFACE DISPOSAL OF RESIDUAL SOLIDS (503 EXEMPT) PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as
amended, and other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Occidental Chemical Corporation
New Hanover County
Wq
continued operation of a residuals stabilization/conveyance facilities consisting of the following minimum
components: a stabilization tank for mixing residuals with crushed limestone or other alkaline
amendment; approximately 3,880 linear feet of five -inch above -ground force main to convey stabilized
residuals to and provide proper distribution of stabilized residuals throughout the surface disposal unit; as
well as all associated piping, valves, electrical and instrumental/control systems, and other appurtenances
necessary to make complete and functional residuals stabilization/conveyance facilities AND
continued operation of a surface disposal unit consisting of the following minimum components: one
96.0-acre section known as Quarry I/Section I with the total net capacity of 4,177,787 cubic yards (i.e.,
439,188 cubic yards of net capacity remaining as of December 31, 2001), one 70.6-acre section known as
Quarry I/ Section H with the total net capacity of 3,341,817 cubic yards (i.e., 2,857,631 cubic yards of net
capacity remaining as of December 31, 2001); as well as all associated piping, valves, electrical and
instrumental/control systems, and other appurtenances necessary to make a complete and functional
surface disposal unit for the disposal of up to 171,000 dry tons per year of material (i.e., stabilized
residuals from Occidental Chemical Corporation's Castle Hayne, NC Manufacturing Facility located at
5408 Holly Shelter Road and limestone tailings from the adjacent Martin Marietta Materials, Inc. mining
operation).
The activities associated with the residuals stabilization/conveyance facilities and surface disposal unit
shall not result in a discharge of wastes to the surface waters; shall be pursuant to the permit renewal
application received on December 31, 2001; and shall be in conformity with the project plans,
specifications, and other supporting data subsequently filed and approved by the Department of
Environment and Natural Resources and considered a part of this permit.
This permit shall be effective from the date of issuance until November 30, 2007; shall void
Permit No. WQ0001492, issued on March 26, 1997; and shall be subject to the following specified
conditions and limitations:

L PERFORMANCE STANDARDS
1. Within 30 calendar days of this permit's issuance, the Per Tdttee shall submit a letter, signed
by a principal executive officer of at least the level of vice president with the Permittee, that
specifically delegates the new signing official/responsible party for the purpose of this
permit's reissuance and subsequent compliance (i.e., Mr. Frank R. Barone, Site Manager).
One copy of the requested information shall be submitted to the NCDENR-DWQ, Water
Quality Section, Non -Discharge Permitting Unit, 1617 Mail Service Center, Raleigh, NC
27699-1617.
2. Within 30 calendar days of this permit's issuance, the Permittee shall provide information
regarding the latitudes and longitudes of the approximate center of Quarry I/Section I and
Quarry I/Section U of the surface disposal unit. The Permittee shall also indicate the method
used, which data set (i.e., NAD 27 or NAD 83) was used, and the accuracy used to obtain the
latitude and longitude information. One copy of the requested information shall be submitted
to the NCDENR-DWQ, Water Quality Section, Non -Discharge Permitting Unit, 1617 Mail
Service Center, Raleigh, NC 27699-1617.
3. It is the Division of Water Quality's (Division) understanding that the Permittee sold certain
assets at the Castle Hayne, NC Manufacturing Facility to Elementis Chromium, L.P. on
December 6, 2002. Specifically, Elementis Chromium, L.P. has purchased all above -ground
assets, including the manufacturing facility, the wastewater treatment facilities permitted
under NPDES Permit No. NC0003875, and the residuals stabilization/conveyance facilities.
The Permittee has retained ownership of all land, including various groundwater remediation
and monitoring facilities and the surface disposal unit_
As such, Elementis Chromium, L.P. intends to submit a permit application package to the
Division's NPDES Unit to request that the following minor modifications be made to NPDES
Permit No. NCO003875:
a. Reflection of the transfer of ownership of the wastewater treatment facilities from the
Perrittee to Elementis Chromium, L.P.;
b_ Inclusion of the residuals stabilization/conveyance facilities in the description of the
permitted wastewater treatment facilities; and
c. Allowance of continued discharge of remediated groundwater and surface disposal unit
supernatant from facilities permitted to the Permittee to the permitted wastewater
treatment facilities.
Within 30 calendar days of receiving acknowledgement that Elementis Chromium, L.P. has
successfully modified NDPES Permit No. NC0003875, the Permittee shall submit a permit
application package to request that the following minor modifications be made to this permit:
a. Delete all references to the residuals stabilization/conveyance facilities and
b. Change the owner name for the permitted residuals source -generating facility in
Condition I. 6. from the Permittee to Elementis Chromium, L.P.
Submit four copies of a permit application package that consists of the fonowing minimum
components to the NCDENR-DWQ, Water Quality Section, Non -Discharge Permitting Unit,
1617 Mail Service Center, Raleigh, NC 27699-1617:
a. A cover letter that describes in detail the requested permit modifications;
b. A copy of the modified NPDES Permit No. NC0003875; and
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c. A copy of any memorandum of agreement or other contractual agreement that stipulates
how the Permittee and Elementis Chromium, L.P. will cooperate to ensure that all
conditions of this permit, including the required non-compliance notification, are met.
4. The residuals stabilization/conveyance facilities and surface disposal unit shall be effectively
maintained and operated as a non -discharge system to prevent the discharge of any wastes
resulting from the operation of the unit.
The issuance of this permit shall not relieve the Permittee of the responsibility for damages to
surface waters or groundwater resulting from the operation of the residuals
stabilization/conveyance facilities and/or surface disposal unit.
b. In the event that the residuals stabilization/conveyance facilities and/or surface disposal unit
are not operated satisfactorily, including the creation of nuisance conditions, the Permittee
shall cease stabilizing residuals, conveying residuals to the unit, and/or disposing of the
residuals in the unit as appropriate, contact the Water Quality Section of the Division's
Wilmington Regional Office, and take any immediate corrective actions as may be required
by the Division.
7. No residuals other than those generated by the following residuals source -generating facilities
shall be approved for disposal in the surface disposal unit in accordance with this permit:
Source County Permit Number Maximum Dry Tons per Year
Occidental Chemical Corporation - Castle Hayne, NC Manufacturing Facility
New Hanover NPDES Permit No. NC0003875 171,000b
A limited amount of limestone tailings from the Martin Marietta Materials, Inc. mining
operation located adjacent to the Permittee's Castle Hayne, NC Manufacturing Facility
may be disposed of in the surface disposal unit. Only limestone tailings from Martin
Marietta Materials, Inc. mining operation that would ordinarily be disposed of in its
primary disposal facility as approved by the North Carolina Division of Land Resources
shall be disposed of in the unit. Disposal events shall only occur when Martin Marietta
Materials, Inc.'s primary disposal facility is not available and shall not cause the
Permittee to exceed the 171,000-maximum dry ton per year residuals production/disposal
rate. Specifically, this rate is the maximum that shall be allowed for disposal in the unit
by both the Perminee and Martin Marietta Materials, Inc.
The 171,000-dry ton per year maximum residuals production/disposal rate includes
residuals and the crushed limestone or other alkaline amendment added to the residuals
for the purpose of residuals stabilization.
Only residuals that have been adequately stabilized crushed limestone or other alkaline
amendment shall be disposed of in the surface disposal unit. The goal of the stabilization
process shall be to raise the residuals to the proper pH in order to render the chromium in the
residuals essentially immobile.
9. Only residuals that are non -hazardous under the Resource Conservation and Recovery Act
(RCRA) shall be disposed of in the surface disposal unit.

10. The pollutant concentrations in the residuals that will be disposed of in the surface disposal
unit shall not exceed the following Ceiling Concentrations (i.e., dry weight basis):
Parameter
Ceiling Concentration
(milligrams per kilo ram
Arsenic
30
Chromium'
200
Nickel
210
Residuals that exceed the ceiling concentration for chromium may be disposed of in the
surface disposal unit as long as that they are determined to be non -hazardous under
RCRA with respect to chromium leachability as stipulated in Condition III. 3. and as long
as the groundwater monitoring program as stipulated in Condition IV. 1. a. demonstrates
that the surface disposal unit is not causing the assigned groundwater quality standards to
be violated.
11. Level gauges shall be maintained at all times to monitor freeboard levels in Quarry I/Section I
and Quarry I/Section H of the surface disposal unit.
If not already existing, level gauges that meet the criteria for monitoring freeboard levels as
stipulated in Condition H. 4. shall be installed in Quarry I/Section I and Quarry I/Section H of
the surface disposal unit within 90 calendar days of this permit's issuance. Care shall be
taken not to damage the integrity of the unit when installing the gauge. A certification from a
North Carolina -licensed professional engineer shall serve as proof of compliance with this
condition.
12. The following buffer zones shall be maintained:
a. 50 feet between the residuals stabilization/conveyance facilities and any property line;
b. 400 feet between an active surface disposal unit and any habitable residence;
c. 100 feet between an active surface disposal unit and any public or private water supply
source, all streams classified as WS or B, waters classified as SA or SB and any Class I
or Class 11 impounded reservoir used as a source of drinking water;
d. 100 feet between an active surface disposal unit and any stream, lake, river, or natural
drainage way;
e. 50 feet between an active surface disposal unit and property lines (if the original permit
was issued with the buffer distance to property line as 100 feet, updated maps must be
submitted and new acreage delineated for the buffer to be reduced);
f. 10 feet between an active surface disposal unit and any interceptor drains or surface water
diversions (upslope);
g. 25 feet between an active surface disposal unit and any interceptor drains or surface water
diversions (downslope); and
h. 25 feet between an active surface disposal unit and any groundwater Iowering and surface
drainage ditches.
4

Some of the buffers specified above may not have been included in previous permits for this
surface disposal unit. These buffers are not intended to prohibit or prevent modifications that
are required by the Division to improve performance of the existing unit. These buffers do,
however, apply to modifications of the unit. These buffers do also apply to any expansion or
modification of the unit and apply in instances in which the sale of property would cause any
of the buffers now complied with, for the surface disposal unit, to be violated. The Permittee
is advised that any modifications to the existing surface disposal unit shall require a permit
modification.
13. The surface disposal unit shall not be located in an unstable area.
14. The surface disposal unit shall not restrict the flow of a base flood.
II. OPERATION AND MAINTENANCE REQUIREMENTS
1. The residuals stabilization/conveyance facilities and the surface disposal unit shall be
properly maintained and operated at all times.
2. Upon classification by the Water Pollution Control System Operators Certification
Commission (WPCSOCC), the Permittee shall designate and employ a certified operator to
be in responsible charge (ORC) and one or more certified operator(s) to be back-up ORC(s)
of the residuals stabilization/conveyance facilities and surface disposal unit in accordance
with 15A NCAC 8G .0201. The ORC shall visit the facilities and unit in accordance with
15A NCAC 8G .0204 or as specified in this permit and shall comply with all other conditions
specified in these rules_
3. A copy of this permit shall be maintained on site when residuals are being stabilized,
conveyed, and/or disposed of in the surface disposal unit during the life of this permit. A
spill prevention and control plan shall be maintained on site at all times.
4. Freeboard in Quarry I/Section I and Quarry I/Section H of the surface disposal unit shall not
be less than two feet at any time. The freeboard levels in each of the referenced lagoons shall
be monitored by an individual level gauge that has readily visible permanent markings
indicating the maximum liquid level at the top of the temporary liquid storage volume,
minimum liquid level at the bottom of the temporary liquid storage volume, and top of the
dam elevations. Freeboard levels in each of the referenced sections of the unit shall be
monitored and recorded daily (i.e., excluding weekends and State holidays).
Supernatant from the surface disposal unit shall be collected and returned to the wastewater
treatment facilities serving the Permittee's Castle Hayne, NC Manufacturing Facility as
necessary to maintain the required freeboard.
G. Adequate provisions shall be taken to prevent wind erosion from conveying pollutants or
residuals from the surface disposal unit onto the adjacent property or into any surface waters.
7. Adequate provisions shall be taken to prevent any surface runoff from occurring from the
surface disposal unit. If runoff cannot be prevented, a collection system shall be installed
with the capacity to handle runoff from a 24-hour, 25-year storm event. All collected runoff
shall be disposed in a manner approved by the Division.
5

8. A protective vegetative cover shall be established and maintained on the embankments of
Quarry I/Section I and Quarry I/Section II of the surface disposal unit (i.e., outside toe of
embankment to maximum liquid leveI), berms, pipe runs, erosion control areas, and surface
water diversions. Trees, shrubs, and other woody vegetation shall not be allowed to grow on
the unit dikes or embankments. All embankment areas shall be kept mowed or otherwise
controlled and accessible.
9. Food crops, feed crops, and/or fiber crops shall not be grown on the surface disposal unit,
unless approval has been requested and received from the Division.
10. Animals shall not be grazed on the surface disposal unit, unless approval has been requested
and received from the Division.
11. Appropriate measures shall be taken to control public access to the surface disposal unit
during active use and for the 36-month period following closure of the surface disposal unit.
Such controls may include fencing and the posting of signs indicating the activities being
conducted at the unit.
III. MONITORING AND REPORTING REQUIREMENTS
Any monitoring (i.e., including groundwater, surface water, residuals, soil, or plant tissue
analyses) deemed necessary by the Division to insure protection of the environment shall be
established and an acceptable sampling and reporting schedule shall be followed.
2. Residuals generated by the approved residuals source -generating facility listed in Condition I.
6. shall be analyzed to demonstrate that they are non -hazardous under RCRA annually. A
corrosivity, ignitability, and reactivity analysis as well as a Toxicity Characteristics Leaching
Procedure (TCLP) analysis shall be conducted on residuals generated by each approved
residuals source -generating facility. If residuals generated by a particular residuals source -
generating facility are disposed of in the surface disposal unit at a frequency less than
annually, the analyses shall be required for each disposal event. The results of all analytical
determinations shall be maintained on file by the Permittee for a minimum of five years.
The TCLP analysis shall include the following parameters (i.e., note the regulatory level in
milligrams per liter in parentheses):
Arsenic (5.0)
1,4-Dichlorobenzene (7.5)
Nitrobenzene (2.0)
Barium (100.0)
1,2-Dichloroethane (0.5)
Pentachlorophenol (100.0)
Benzene (0.5)
1,1-Dichloroethylene (0.7)
Pyridine (5.0)
Cadmium (1.0)
2,4-Dinitrotoluene (0.13)
Selenium (1.0)
Carbon tetrachloride (0.5)
Endrin (0.02)
Silver (5.0)
Chlordane (0.03)
Hexachlorobenzene (0.13)
Tetrachloroethylene (0.7)
Chlorobenzene (100.0)
Heptachlor (and its hydroxide) (0.008) Toxaphene (0.5)
Chloroform (6.0)
Hexachloro-1,3-butadiene (0.5)
Trichloroethylene (0.5)
Chromium (5.0)
Hexachloroethane (3.0)
2,4,5-Trichlorophenol (400.0)
m-Cresol (200.0)
Lead (5.0)
2,4,6-Trichlorophenol (2.0)
o-Cresol (200A)
Lindane (0.4)
2,4,5-TP (Silvex) (1.0)
p-Cresol (200.0)
Mercury (0.2)
Vinyl chloride (0.2)
Cresol (200.0)
Methoxychlor (10.0)
2,4 D (10.0)
Methyl ethyl ketone (200.0)

3. Residuals generated by the approved residuals source -generating facility listed in Condition I.
6. shall be analyzed to demonstrate that they are non -hazardous under RCRA with respect to
chromium leachability (i.e., leachate from a TCLP analyzed for chromium only).
The following sampling schedule shall be followed:
a. Grab sample: One per week, minimum.
b. CoMRosite sample: One per week, minimum.
The results of all analytical determinations shall be maintained on file by the Permittee for a
minimum of five years and shall be submitted on a monthly basis to the following address:
Water Quality Regional Supervisor
Wilmington Regional Office
NCDENR-DWQ
127 Cardinal Drive Extension
Wilmington, North Carolina 28405-3845
4. A representative analysis shall be conducted on residuals generated by the approved residuals
source -generating facility listed in Condition I.6. monthly by the Pernlittee, and the results of
all analytical determinations shall be maintained on file by the Permittee for a minimum of
five years. The analysis shall include but is not necessarily limited to the following
parameters:
Arsenic Nickel
Chromium Percent Total Solids
The Permittee may utilize test methods in the most -recent update of the document entitled
"'Pest Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW-846),"
published by the United States Environmental Protection Agency's Office of Solid Waste, for
the analysis of the metal parameters. Analytical results for the metal parameters shall be
reported on a dry weight basis.
5. Laboratory analyses as required by Condition 111. 1, Condition III. 2., Condition III. 3., and
Condition III.4. shall be performed/gathered on the residuals as they are to be disposed of in
the surface disposal unit (i.e., residuals that have been stabilized with crushed limestone or
other alkaline amendment). Furthermore, analytical determinations made pursuant to the
monitoring and reporting requirements of this permit shall be made by a laboratory certified
by the Division for the required parameter(s) under 15A NCAC 2H .0800 or 15A NCAC 2H
.1100.
6. Proper records shall be maintained by the Permittee tracking all disposal activities associated
with the surface disposal unit. All records shall be kept by the Permittee for a minimum
period of five years from the date of disposal. These records shall include, but shall not
necessarily be limited to, the following information:
a. Date and freeboard Ievel measurements in Quarry I/Section I and Quarry/Section II; of
the surface disposal unit;
b. Source and date of disposal in the surface disposal unit for the residuals or limestone
tailings from the adjacent Martin Marietta Materials, Inc_ mining operation;
c. Volume of residuals or limestone tailings from the adjacent Martin Marietta Materials,
Inc. mining operation disposed of in Quarry I/Section I and Quarry .I/Section II of the
surface disposal unit in gallons per year, dry tons per year, or kilograms per year,
fd

d. Cumulative volume of residuals or limestone tailings from the adjacent Martin Marietta
Materials, Inc. reining operation disposed of in Quarry ISection I and Quarry USection II
of the surface disposal unit in gaIIons or cubic yards (i.e., excluding freeboard);
e. Remaining volume in Quarry ISection I and Quarry ISection II of the surface disposal
unit in gaIIons or cubic yards (i.e., excluding freeboard); and
f. An estimate of the remaining useful disposal life for Quarry USection I and Quarry
ISection II of the surface disposal unit in years (i.e., excluding freeboard).
Three copies of all required monitoring and reporting requirements as specified in Condition
III. 1., Condition III, 2., Condition M. 3., Condition III. 4., Condition III. 5., and Condition
III. 6. shall be submitted annually on or before March Ist of the year following the disposal
event to the following address:
NCDENR-DWQ
Water Quality Section
Non -Discharge Compliance/Enforcement Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Noncompliance Notification:
The Permittee shall report by telephone to the Water Quality Section of the Division's
Wilmington Regional Office, telephone number [phone], as soon as possible, but in
no case more than 24 hours or on the next working day following the occurrence or first
knowledge of the occurrence of any of the following:
a. Any occurrence with surface disposal activities that results in the disposal of significant
amounts of wastes that are abnormal in quantity or characteristic.
b. Any failure of the surface disposal activities resulting in a release of material to receiving
waters.
c. Any time that self -monitoring information indicates that the surface disposal unit has
gone out of compliance with the conditions and limitations of this permit or the
parameters on which the system was designed.
d. Any process unit failure, due to known or unknown reasons, that renders the a surface
disposal unit incapable of adequate residual treatment.
e. Any spillage or discharge from a vehicle or piping system transporting residuals to the
surface disposal unit.
Persons reporting such occurrences by telephone shall also file a written report in letterform
within five days following first knowledge of the occurrence. This report must outline the
actions taken or proposed to be taken to ensure that the problem does not recur.

1V. GROUNDWATER REQUIREMENTS
Samplinj! Requirements:
Sampling results from groundwater monitoring wells shall be reported according to the
designations as follows (i.e., per a previous correspondence dated December 16, 1997
from the Division to the Permittee):
Previous
Deli ation
Current
Designation
Previous
Designation
Current
Designation
CPW-13S
MW-1
CPW-7S
MW-17
CPW-14S
MW-2
CPW-8S
MW-18
CPW-15S
MW-3
CPW-9S
MW-19
CPW-8DR
MW-8
CPW-1 OS
MW-20
CPW-9D
MW-9
CPW-5S
MW-21
CPW-10D
MW-10
CPW-2D*
MW-22*
CPW-lS*
MW-11*
CPW-3D*
MW-23*
CPW-12D
MW-12
CPW4D*
MW-24*
CPW-13D
MW-13
CPW-5D
MW-25
CPW-14D
MW-14
CPW-6D
MW-26
CPW-15D
MW-15
CPW-7D
MW-27
CPW-6S
MW-16
CPW-12S
MW-28
* Sampling and reporting of sampling results from these wells shall not be required
under the conditions of this permit. Note that sampling and reporting of sampling
results from these wells shall still continue as stipulated under the corrective action
plan (CAP) that was approved for the Permittee's Castle Hayne, NC Manufacturing
Facility in 1999.
b. Groundwater monitoring wells MW-I, MW-2, MW-3, MW-8, MW-9, MW-10, MW-12,
MW-13, MW-14, MW-15, MW-16, MW-17, MW-18, MW-19, MW-20, MW-21, MW-
25, MW-26, MW-27, and MW-28 shall be sampled every March, July, and November for
the parameters listed below:
Chlorides
Iron
Total Dissolved Solids
Chromium
pH
Water Level
Water levels in the groundwater monitoring wells shall be measured prior to sampling the
groundwater for the remaining parameters. The depth to water in each well shall be
measured from the surveyed point on the top of the casing, which shall be surveyed
relative to a common datum.
Any laboratory selected to analyze parameters shall be Division -certified for those
parameters required.
Reportin-gIDocumentation Requirements:
a. The results of the sampling and analysis shall be received on the most -recent version of
"Groundwater Quality Monitoring: Compliance Report Farm" (i.e., GW-59 Form) with
copies of the laboratory analyses attached by the Division's Groundwater Section on or
before the last working day of the month following the sampling month.

V.
b. All reports shall be mailed to the following address:
NCDENR-DWQ
Groundwater Section
Permits and Compliance Unit
1636 Mail Service Center
Raleigh, NC 27699-1636
Updated blank reporting forms may be downloaded from the web site for the Division's
Groundwater Section at http://gw.ehnr.state.nc.us/ or requested from the address listed
above.
Applicable Boundaries:
a. The COMPLIANCE BOUNDARY for the surface disposal unit is specified by
regulations in 15A NCAC 2L (i.e., Groundwater Classifications and Standards). An
exceedance of Groundwater Quality Standards at or beyond the Compliance Boundary is
subject to immediate remediation action according to 15A NCAC 2L .0106 (d)(2).
i. The Compliance Boundary for Section I of Quarry I, since this section of the surface
disposal unit was individually permitted before December 31, 1983, shall be is
established at either (1) 500 feet from this section of the surface disposal unit or (2) at
the property boundary, whichever is closest to this section of the surface disposal
unit.
ii. The Compliance Boundary for Section Il of Quarry 1, since this section of the surface
disposal unit was individually permitted after December 31, 1983, shall be is
established at either (1) 250 feet from this section of the surface disposal unit or (2)
50 feet within the property boundary, whichever is closest to this section of the
surface disposal unit.
b. The REVIEW BOUNDARY shall be established around the surface disposal unit
midway between the Compliance Boundary and the perimeter of the surface disposal
unit. Any exceedance of Groundwater Quality Standards at the Review Boundary shall
require action in accordance with 15A NCAC 2L .0106 (d)(1).
4. Other Requirements:
a. Any additional groundwater quality monitoring, as deemed necessary by the Division,
shall be provided.
INSPECTIONS
1. The Permittee or his designee shall inspect the residuals storage, transport, and disposal
facilities to prevent malfunctions and deterioration, operator errors and discharges which may
cause or lead to the release of wastes to the environment, a threat to human health, or a
nuisance. The Permittee shall maintain an inspection log or summary including at least the
date and time of inspection; observations made; and any maintenance, repairs, or corrective
actions taken by the Permittee. This log of inspections shall be maintained by the Permittee
for a period of five years from the date of the inspection and shall be made available to the
Division or other permitting authority, upon request.
10

2. Any duly authorized officer, employee, or representative of the Division may, upon
presentation of credentials, enter and inspect any property, premises, or place on or related to
the surface disposal unit at any reasonable time for the purpose, of determining compliance
with this permit; inspect or copy any records that must be kept under the terms and conditions
of this permit; and obtain samples of groundwater, surface water, or leachate.
VI. GENERAL CONDITIONS
1. This permit shall become voidable unless the disposal activities are carried out in accordance
with the conditions of this permit, the supporting materials, and in the manner approved by
this Division.
2. This permit shall be effective only with respect to the nature and volume of wastes described
in the application and other supporting data.
3. This permit shall not be automatically transferable. In the event that there is a desire for the
surface disposal unit to change ownership or a name change of the Permittee, a formal permit
request shall be submitted to the Division accompanied by documentation from the parties
involved and other supporting materials as may be appropriate. The approval of this request
shall be considered on its merits and may or may not be approved.
4. Failure to abide by the conditions and limitations contained in this permit may subject the
Permittee to an enforcement action by the Division in accordance with North Carolina
General Statutes § 143-215.6A through § 143-215.6C.
The annual administering and compliance fee shall be paid by the Permittee within 30 days
after being billed by the Division. Failure to pay the fee accordingly may cause the Division
to initiate action to revoke this permit as specified by 15 NCAC 2H .0205 (c)(4).
6. The issuance of this permit does not preclude the Permittee from complying with any and all
statutes, rules, regulations, or ordinances which may be imposed by other government
agencies (i.e., local, state, and federal) which have jurisdiction, including, but not limited to,
applicable river buffer rules in 15A NCAC 2B .0200, erosion and sedimentation control
requirements in 15A NCAC Chapter 4 and under the Division's General Permit NCG010000,
and any requirements pertaining to wetlands under 15A NCAC 2B .0200 and 15A NCAC 2H
.0500. The issuance of this permit also does not preclude the Permittee from complying with
the mine recovery plan that has been approved by the Land Quality Section of the Division of
Land Resources.
7. The Permittee, at least six months prior to the expiration of this permit, shall request its
extension. Upon receipt of the request, the Division shall review the adequacy of the surface
disposal unit described therein and, if warranted, shall extend the permit for such period of
time and under such conditions and limitations as it may deem appropriate.
8. This permit may be modified, or revoked and/or reissued to incorporate any conditions,
limitations, and monitoring requirements the Division deems necessary in order to protect the
environment and public health adequately.
11

9. The Division shall be notified in writing at least 180 days prior to closing of the surface
disposal unit. A formal closure plan and a post -closure management care program for the
surface disposal unit shall be submitted at that time. This information shall be specific to the
surface disposal unit as well as relate to the Permittee's future plans for the land. A schedule
for implementing both the closure plan and the post -closure management care program shall
be provided as well. The Division will accept a submittal that has been prepared in
accordance with the document entitled "Process Design Manual: Surface Disposal of Sewage
Sludge and Domestic Septage (EPA/625/R-95/002)," published by the United States
Environmental Protection Agency's Office of Research and Development. Submit three
copies of all information to NCDENR-DWQ, Non -Discharge Permitting Unit, 1617 Mail
Service Center, Raleigh, NC 27699-1617.
Permit issued this the thirtieth day of December, 2002.
NORTH C LINA ENVIRONMENTAL MANAGEMENT COMMISSION
for Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0001492
12

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FIGURE 2
OCCIDENTAL CHEMICAL CORPORATION
SURFACE DISPOSAL OF RESIDUAL SOLIDS
NEW HANOVER COUNTY
WQ0001492/GW02013
SITE DETAIL MAP